Analysis

  • max time kernel
    143s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/02/2024, 07:25

General

  • Target
    SecuriteInfo.com.Win32.DropperX-gen.10565.11333.exe
  • Size 1.4MB
  • Sample240228-h81twsec46
  • SHA256 7d9bee4647aad795531feb6eb3dabe03a3244493c489759bbccedfecb2d11f33
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • br-remco.is-a-knight.org:57208

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-MM4UDG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • ModiLoader Second Stage 1 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Program crash 1 IoCs
  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.DropperX-gen.10565.11333.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.DropperX-gen.10565.11333.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4736
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\CuurddnfO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4748
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows "
        3⤵
          PID:4716
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:764
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:4784
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:3264
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:5052
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
              3⤵
                PID:1768
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:4352
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "x.bat" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:3128
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
                3⤵
                  PID:4788
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of WriteProcessMemory
                  PID:4720
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:908
                    • C:\Windows\system32\sc.exe
                      sc.exe create truesight binPath="C:\Users\Public\Libraries\truesight.sys" type=kernel
                      5⤵
                      • Launches sc.exe
                      PID:4924
                    • C:\Windows\system32\cmd.exe
                      cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3616
                      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                        powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                        6⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:2316
                    • C:\Windows\system32\sc.exe
                      sc.exe start truesight
                      5⤵
                      • Launches sc.exe
                      PID:912
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c "C:\\Windows \\System32\\easinvoker.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:3876
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  PID:1708
              • C:\Windows\SysWOW64\colorcpl.exe
                C:\Windows\System32\colorcpl.exe
                2⤵
                • Suspicious use of SetThreadContext
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:5112
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\vnvnbnovahwfkyqhwxrraogpt"
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2544
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\kthvavdtmzesiscdfmfxxb"
                  3⤵
                  • Accesses Microsoft Outlook accounts
                  PID:5052
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\irckhdszqrmnxegzvjs"
                  3⤵
                    PID:536
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 5112 -s 1440
                    3⤵
                    • Program crash
                    PID:2092
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5112 -ip 5112
                1⤵
                  PID:3824
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3948 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
                  1⤵
                    PID:4356

                  Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

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                        Downloads

                        __PSScriptPolicyTest_1ai21hpc.uf2.ps1

                        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1ai21hpc.uf2.ps1
                        • Size 60B
                        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                        • MD5 SHA1 SHA512

                        irckhdszqrmnxegzvjs

                        • Path C:\Users\Admin\AppData\Local\Temp\irckhdszqrmnxegzvjs
                        • Size 4KB
                        • SHA256 7176ca3d0196ec46f178107fdb587adaef3f6ea65daa80eccd2371a515880e04
                        • MD5 SHA1 SHA512 SSDEEP

                        CuurddnfO.bat

                        • Path C:\Users\Public\Libraries\CuurddnfO.bat
                        • Size 7KB
                        • SHA256 f46e0cc2c119a32dd87edf97bfc73d985ee97d2c9dc00274b6b20d641e29deea
                        • MD5 SHA1 SHA512 SSDEEP

                        KDECO.bat

                        • Path C:\Users\Public\Libraries\KDECO.bat
                        • Size 4KB
                        • SHA256 c8e1912a3328802e98563e32eb053ae3e28249b701054af227e9f1ba6bfe24d9
                        • MD5 SHA1 SHA512 SSDEEP

                        easinvoker.exe

                        • Path C:\Users\Public\Libraries\easinvoker.exe
                        • Size 128KB
                        • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                        • MD5 SHA1 SHA512 SSDEEP

                        netutils.dll

                        • Path C:\Users\Public\Libraries\netutils.dll
                        • Size 115KB
                        • SHA256 4b186952d56dddacaf1738c1b268a62acb12cbf472fbf1a6083a49be0f9ef03d
                        • MD5 SHA1 SHA512 SSDEEP

                        easinvoker.exe

                        • Path C:\Windows \System32\easinvoker.exe
                        • Size 27KB
                        • SHA256 1e4a4c8b4824a4aaa4a55c1974e5d683361479b4a6ac6265699acf693caa0c4a
                        • MD5 SHA1 SHA512 SSDEEP

                        easinvoker.exe

                        • Path C:\Windows \System32\easinvoker.exe
                        • Size 19KB
                        • SHA256 3b908ac08b9646f3018307c28baedcee48ad457f63c4d10c4401788455103d5b
                        • MD5 SHA1 SHA512 SSDEEP

                        memory/536-78-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/536-77-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/536-66-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/536-91-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/536-73-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/1708-50-0x00000000613C0000-0x00000000613E3000-memory.dmp

                        memory/2316-27-0x000001E17D080000-0x000001E17D0A2000-memory.dmp

                        memory/2316-37-0x00007FFCA1D00000-0x00007FFCA27C1000-memory.dmp

                        memory/2316-41-0x000001E17D270000-0x000001E17D280000-memory.dmp

                        memory/2316-40-0x000001E17D270000-0x000001E17D280000-memory.dmp

                        memory/2316-39-0x000001E17D270000-0x000001E17D280000-memory.dmp

                        memory/2316-44-0x00007FFCA1D00000-0x00007FFCA27C1000-memory.dmp

                        memory/2544-76-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2544-80-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2544-70-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2544-74-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/4720-26-0x00000000613C0000-0x00000000613E3000-memory.dmp

                        memory/4736-0-0x0000000002310000-0x0000000002311000-memory.dmp

                        memory/4736-45-0x0000000002310000-0x0000000002311000-memory.dmp

                        memory/4736-1-0x0000000002A60000-0x0000000003A60000-memory.dmp

                        memory/4736-2-0x0000000002A60000-0x0000000003A60000-memory.dmp

                        memory/4736-4-0x0000000000400000-0x000000000056D000-memory.dmp

                        memory/5052-71-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/5052-75-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/5052-67-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/5052-103-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/5052-79-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/5112-55-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-57-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-56-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-58-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-62-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-51-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-64-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-93-0x0000000015910000-0x0000000015929000-memory.dmp

                        memory/5112-96-0x0000000015910000-0x0000000015929000-memory.dmp

                        memory/5112-63-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-97-0x0000000000E40000-0x0000000001E40000-memory.dmp

                        memory/5112-54-0x0000000000E40000-0x0000000001E40000-memory.dmp